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Slow,steady aerobic activity uses mostly fat as an energy source.
Cardiac Muscle
Involuntary, striated type of muscle found in the vertebrate heart. Compare with smooth muscle and skeletal muscle.
Rigor Mortis
A temporary stiffening of muscles occurring after death as a result of chemical changes in muscle tissues.
Calcium Ions
Charged particles of calcium that play key roles in blood clotting, muscle contraction, and nerve function.
Troponin
A complex of three regulatory proteins involved in muscle contraction in skeletal and cardiac muscles.
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